Abstract: An improved hand-held tire pressure monitoring system (TPMS) tool for communicating and transferring data between the tool and an onboard vehicle TPMS. The improved tool includes absolute air pressure and temperature compensation components and processes which improve the accuracy of service on a vehicle tire equipped with TPMS sensors and diagnosing TPMS error codes generated by the vehicle TPMS.

Abstract: Disclosed herein is an improved universal TPMS tool. According to one aspect of the tool, the tool can include a housing and a processor and a memory storage device positioned within the housing. The tool can optionally include a key pad positioned on the housing in communication with the processor for input of commands from a user, an electronic communication port positioned on the housing in communication with the processor, and an antenna for transmission and receipt of electronic information from the plurality of TPMS tire sensors. The tool can also include an optical scanner for reading indicia connected to the vehicle.